Sintering and Microstructures of SUS 316L Powder Produced by 3D Printing Process

Abstract

Selective laser sintering (SLS) is a type of laminating sintering technique, using CO2laser with (metal, polymer, and ceramic) powders. In this result, the flake SUS 316L was used to achieve a high porous product, and compare to spherical type. After SLS, the porosity of flake-type sample with 34% was quite higher than that of the spherical-type one that had only 11%. The surface roughness of the flake SLS sample were also investigated in both inner and surface parts. The results show that the deviation of the roughness of the surface part is about 64.40μm, while that of the internal one was about 117.65μm, which presents the containing of high porosity in the uneven surfaces. With the process using spherical powder, the sample was quite dense, however, some initial particles still remained as a result of less energy received at the beneath of the processing layer.

Effects of sintering temperature and particle size on permeability of functionally gradient composite porous materials prepared by hanging slurry process

“…This is especially true fact in the field of filtration and separation where are many applications. It requires that such materials should have higher filtration accuracy and greater transmittance while having smaller pore size, which makes it difficult for traditional homogeneous porous materials to achieve the desired effect, and the emergence of gradient porous composite materials just solves this contradiction [13][14][15][16][17][18]. During the process of practical application, in order to guarantee the various properties of porous materials, asymmetric membrane structure is mostly adopted than before.…”